Oxide ceramics yog ib chav kawm ntawm cov khoom siv qib siab uas lawv muaj nyob hauv cov khoom, uas feem ntau muaj cov hlau txuas nrog oxygen. Lo lus "oxide" yog hais txog qhov muaj cov pa oxygen hauv cov qauv tshuaj, tsim cov tshuaj hu ua hlau oxides. Cov ceramics no nthuav tawm ntau yam khoom thiab pom ntau daim ntawv thov thoob plaws ntau yam kev lag luam.
Alumina (aluminium oxide, Al2O3), zirconia (zirconium oxide, ZrO2), magnesia (magnesium oxide, MgO), thiab titanium (titanium oxide, TiO2) yog cov hlau oxides uas feem ntau pom nyob rau hauv oxide ceramics. Txhua oxide ceramic muaj cov khoom tshwj xeeb uas ua rau nws haum rau cov ntawv thov tshwj xeeb.
Cov khoom ntawm Oxide Ceramics
Siab Melting Point
Ib qho ntawm cov yam ntxwv tseem ceeb ntawm oxide ceramics yog lawv cov ntsiab lus siab melting. Cov cuab yeej no ua rau lawv tsim nyog rau cov ntawv thov uas muaj qhov kub thiab txias, xws li hauv aerospace thiab automotive industries. Piv txwv li, Alumina yog dav siv rau nws qhov siab melting point thiab exceptional hardness. Nws pom cov ntawv thov hauv cov cuab yeej txiav, abrasives, thiab insulators.
High Hardness thiab hnav tsis kam
Lub hardness thiab hnav tsis kam ntawm oxide ceramics yog tshwj xeeb yog noteworthy. Zirconia, piv txwv li, nthuav tawm lub zog siab thiab tawv, ua rau nws tsim nyog rau cov ntawv thov uas hnav tsis kam yog qhov tseem ceeb. Nws yog siv rau hauv cov cuab yeej txiav, bearings, thiab cov khoom raug rau cov neeg kho tshuab siab.
Hluav taws xob rwb thaiv tsev
Ntau cov oxide ceramics kuj muaj cov khoom siv hluav taws xob zoo heev. Piv txwv li, Alumina yog ib qho insulator zoo, ua rau nws muaj txiaj ntsig hauv kev siv hluav taws xob thiab hluav taws xob. Cov khoom xws li insulators, substrates, thiab Circuit Court boards tau txais txiaj ntsig los ntawm cov hluav taws xob insulating ntawm cov ceramics.
Corrosion Resistance
Kev ruaj ntseg tshuaj kuj yog ib qho tseem ceeb ntawm oxide ceramics. Lawv tsis kam mus rau corrosion thiab tshuaj degradation ua rau lawv haum rau ib puag ncig hnyav. Magnesia, nrog rau nws cov tshuaj ruaj khov siab, yog siv rau hauv cov ntawv thov refractory, xws li cov kab hauv lub qhov cub thiab cov crucibles.
Biocompatibility
Ntxiv rau lawv lub cev thiab tshuaj lom neeg, qee cov oxide ceramics muaj cov yam ntxwv tshwj xeeb uas ua rau lawv tsim nyog rau cov ntawv thov tshwj xeeb. Zirconia, paub txog nws cov biocompatibility, yog siv rau hauv kev kho mob cog thiab kev kho hniav. Nws muaj peev xwm tiv taus ib puag ncig lom neeg yam tsis muaj kev cuam tshuam tsis zoo ua rau nws nyiam cov khoom siv rau qee yam khoom siv kho mob.
Oxide ceramics ua lub luag haujlwm tseem ceeb hauv kev siv tshuab niaj hnub thiab kev lag luam. Lawv cov khoom zoo heev ua rau lawv muaj ntau yam khoom siv rau kev siv xws li cov khoom siv hluav taws xob txiav mus rau cov khoom siv dav hlau thiab cov khoom siv kho mob. Kev tshawb fawb tsis tu ncua hauv cov ntaub ntawv tshawb fawb txuas ntxiv nthuav dav qhov ua tau thiab kev siv ntawm oxide ceramics hauv ntau qhov chaw.
